Review of Non-Nuclear Density Gauges as Possible Replacements for ITD’S Nuclear Density Gauges

Wen, Haifang; Sharma, Sunil; Rose, Mark; Wang, Jingan; Timm, Anthony; Brown, Mary; Washington State University. Dept. of Civil and Environmental Engineering

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Review of Non-Nuclear Density Gauges as Possible Replacements for ITD’S Nuclear Density Gauges

2015-01-01
By Wen, Haifang ; Sharma, Sunil ; Rose, Mark ; ...

[PDF-2.23 MB]

English

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Creators:

Wen, Haifang ; Sharma, Sunil ; Rose, Mark ; Wang, Jingan ; Timm, Anthony ; ... More +

Wen, Haifang ; Sharma, Sunil ; Rose, Mark ; Wang, Jingan ; Timm, Anthony ; Brown, Mary Less -
Corporate Creators:

Washington State University. Dept. of Civil and Environmental Engineering
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:

[+]

Equipment Tests Hot Mix Paving Mixtures Moisture Content Nuclear Density Gages Pavement Layers Quality Assurance Quality Control
Publication/ Report Number:

FHWA-ID-15-210
Resource Type:

Tech Report
Geographical Coverage:

Idaho
Corporate Publisher:

Idaho. Transportation Department
Abstract:

This report examines the possibility of replacing nuclear density gauges (NDGs) with non-nuclear density gauges (NNDGs) to measure density of hot mix asphalt (HMA) and unbound pavement layers in the field. The research team evaluated the effectiveness of five NNDGs for measuring density of HMA and unbound material compaction. A variety of global and local factors were evaluated to determine which factors had a significant effect on the HMA devices. The findings show that, while both NDG and NNDG could produce results that are statistically significantly different from core densities for some projects, calibrated HMA NNDG results perform as well as the current Idaho Transportation Department (ITD) NDG practice. Surface moisture was found to have effects on the NNDG measurements of HMA density. Recommendations were made to modify the test protocol of NNDGs. The team compared the density values and moisture contents of unbound materials (e.g. base, subbase, or subgrade) measured from NNDGs to those obtained using traditional devices: NDG (density and moisture), sand cone (density) and laboratory oven (moisture content). Each NNDG for unbound soils required calibration to a traditional device. Overall, the results indicate that measurements by NNDGs on unbound materials are not consistently accurate or precise enough to replace NDGs.
Format:

PDF
Funding:

RP 210
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:58e7ddc5cf4f23c5c3ca49bed3d13dca2b40ff0c0c4703d42e42ae303645608b
Download URL:

https://rosap.ntl.bts.gov/view/dot/28901/dot_28901_DS1.pdf
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Review of Non-Nuclear Density Gauges as Possible Replacements for ITD’S Nuclear Density Gauges

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